Coefficient of Inbreeding, COI, on pedigree research is historically how we have decided what our dog’s inbreeding was. But, that data can only come close to accurate if we factor in dogs from the past 100 generations. The historical standard is to calculate 10-12 generations. As you can see, these Golden Retrievers in this chart are far lower on their pedigree COI vs their DNA tested COI.
DNA testing at Embark proves the actual amount of compounded inbreeding on any dog. It looks at the Runs of Homozygosity, showing what genes were inherited “the same” from both the mother and the father. This is what defines inbreeding.
Here is an overview I did on DNA testing of Golden Retrievers vs Pedigree data. This study was not done by Embark DNA, but it shows that the science done by Embark DNA agrees with the study’s findings. Study showing DNA vs Pedigree data on Golden Retrievers.
(the full data and links for this chart may not be visible on a phone)
| Golden Retriever | Pedigree 12 Gen COI | Embark DNA COI | K9 Data Link |
| Red-Dawn Lux | 2.61% | 15% | https://k9-data.org/dog/detail/1205558/coi |
| Red-Dawn Resolute River Song | 5.13% | 19% | https://k9-data.org/dog/detail/1088377/coi |
| Red-Dawn Resolute Rosie Cotton | 5.13% | 18% | https://k9-data.org/dog/detail/1344689/coi |
| Crane Hollow Juliet | 8.14% | 33% | https://k9-data.org/dog/detail/1346342/coi |
| Crane Hollows Sir Lucky | 11.01% | 30% | https://k9-data.org/dog/detail/766111/coi |
| Pat Joy’s English Lord Brady | 11.29% | 29% | https://k9-data.org/dog/detail/544639/coi |
| Golden Romance Legendary Lad | 14.31% | 33% | https://k9-data.org/dog/detail/782657/coi |
